function formatTime(timestamp, format) {
  　　const formateArr = ['Y', 'M', 'D', 'h', 'm', 's'];
  　　let returnArr = [];
  　　let date = new Date(timestamp); //13位的时间戳,    如果不是13位的,  就要乘1000,就像这样 let date = new Date(timestamp*1000)
  　　let year = date.getFullYear()
  　　let month = date.getMonth() + 1
  　　let day = date.getDate()
  　　let hour = date.getHours()
  　　let minute = date.getMinutes()
  　　let second = date.getSeconds()
  　　returnArr.push(year, month, day, hour, minute, second);
  　　returnArr = returnArr.map(formatNumber);
  　　for (var i in returnArr) {
  　　format = format.replace(formateArr[i], returnArr[i]);
  }
  　　return format;
  }
  const formatNumber = n => {
  　　n = n.toString()
  　　return n[1] ? n : '0' + n
  }
  
  module.exports = {
  　　formatTime: formatTime
  }